Means for forming metal tubes



June 10, 1930. F. H. POEPPELMEIER I 62,8

MEANS FOR FORMING METAL TUBES Filed May 13. 192 Y 2 Sheets-Sheet 1 32 22V v 151 22 72 H.470 m m ,5" K .52 A v,

14; ATTORNEY I I'NVENTOR,

' June 10, 1930. F. H. POEPPELMEIER v MEANS FOR FORMING METAL TUBESFiled May 13, 1927 2 She-ts-Sheet 2 ,9 V a 9 2 s 83 Z6 Y Q 1 2 :4 %26 Ra/.11. 367.10. 9. Fig.5 F1 1 F1 vfi INVENTOIQ,

. [Patented June i939 FRANK H. POEPPELMEIER; or narrow,

' ASSIGNMENTS, o la e TYPoe PHIoM cHINEs COMPANY, or nnYToN,\o 1 A fcosronn'rrouzor onto V I I ,"TElrf" 4 I r 1; Y"

01-110, Ass'muon ilBY' primer AND 'YMYESNE Y j MnANs FOR romaine.LiE'lA-L U Es" I f This invention'relates to new and useful im- It isthe, principal object of my: invention to provide a machine foreconomically and expeditiously forming from. metal; tubes such as typetubes. ZMy machine first shears prove'ments in means for forming tubesfrom a stri J of metal to-len th with an ear formed ure 1 is a crosssectionalview ofthe machine taken on the l1nev l l of Figure 2. Figure 5is a cross sectional viewtaken through said machine on the line-.5 oiFign re 2,1showmg the idler mounting andoil tube. "Figurefi isasectional view taken through the feeding takenwthrough'thesecond-forming roll and disc. Figure 11. is a sectional viewjtakenrolls. Figure 7 is a sectional viewthrough the shearing rolls. FigureSisasectional view taken throughthe second feeding rolls; Figure 9 is asectional-view. taken through the first forming rolls. Figure 10 isa'sectional view through the final forming rolls. Figure 12 is side viewoi' the type tube formedjby my machine. And'figur'es 13 isadi'agram'matic view showing the shearing unit of my machine.

Referring to the accompanying drawings for a detailed description ofthemachine I -preter'for forming .type tubes, the numeral 1 designates anelongated'fmetal frame 'comprising a base 2 and a central,"verticalsupporting web '3."

Projecting laterally from the v middle ti ono'f the web 3.-onleachsidethereoiin a (See Figures 2 and 4;)

7 horizontal line, are hollow bosses 5. .lVithin the bosses 5 in Figure4, is'a bearingG for a lpulley shaft] upon one reduced end of whichissecuredapulley 8. Upon theother s de of the weh3 there is secured uponthe shaft 7 a roll 9having agrooved periphery 10.

Secured upon the shaft Tbetween the pulley 1927. serial No. 91.099..

v 8 and theweh 333s, a standard gear l l formed with a hub 12 uponwhichthereis secured a gear 13 having onemore tooth'thanflthe gear v11-.'Secured to-theout-er face ofthe gear ll is a spacing disc 14.; :(See Figure4.) i 1 Formedon the web 3-above and in Vertical alinement with thebosses 5, are hollow bosses 15 open at the topto contain floatingbushings 16. iln 'each bushing there is journ'aled a shaftsuch as theshaft 17 in Figure, l'. Upon one end-of thesliaft .17 there is securedaT011 18 formed on its periphery with a wide annular projection 19'adapted to enter' the' groove =10 in the .roll 9 immediately below it.Upon the other end'of the shatt17there between the rolls .9 and 18,there is secured to the bosses15 a top cover plate .15- having formedinitstop portion hollow vertical.

, 5 18 secured gear 20avh'1cl1 meshes with the driv ng geari 11below.-x('See Figures 2 and For. the bhrhoseiof adjusting. the tension Iprojections 21 that receive studs. 22 which,

at their lower ends, .engagethe fioatinglbush ings 16. These studs22rise ahovethe projec t tions 21 to receiveinuts 23 byfwhich thestudsare for ced downwardly to increase the pressure ofthe rolls upon themetal strip-between them, or are drawn upwardlytorelie've that, I

In. order to prevent "the gears 11 and 201 being pressed more 'closely:together when the Trolls 9 and 18 are more tightly engaged; the gear-2 0has secured to its-outer 'facej 'a disc'j,

tension. I

24: which is in peripheral contact with the disc 1l.{ ;These discsland24 will maintain .i by the studs.

- "As shown in F gureither'e' is formed in the-Jtop 15%"ofthe bosses/15'a vertical. oil

. -Beferring to Figures 12 and 5, there is mounted on 'astud 27- securedto thegear side.

the gears on accurate centers irrespective *ofthe pressure'exerteduponthe floating bushof theweb 3, and idler pinion28 that meshes with thegear13. which has one more tooth than the'gear 11. Vith-the latter gearthere meshesan idlerpinion 29 mounted on a stud hieshing with the pinion29 is a gear'31 se-' cured to a shaft 32 journaled in a suitable bearingina pair of other end of this shaft there is secured a roll 33 tooneface of which there is attached a retaining disc 34.

Adapted to be pressed against the roll 33 V is a roll 35 secured to oneend'of a shaft 36 which, like the shaft 17, is floatingly mounted inbosses .15 above the bosses 5 last mentioned. Upon the other end of theshaft 36 there is secured a gear 37 that meshes with'the gear 31 whichdrives it. To the: gears 31 and 37, as well as to the. gears hereinafterto be described, there are secured discs similar to the discs 14 and 24for maintaining said gears on accurate centers. The rolls 33 and 35, aswill be hereinafter described, shear the metal strip from which the typetube is formed. (See Figure 12.)

Mounted 011 the stud 38 is an idler pinion 39 which is in mesh with thegear 31. Mleshing with the'idler pinion 39 is a gear 40 secured toashaft 41 journaled in suitable bearings in one pair of the bosses 5. Onthe other end of this shaft 41, there is secured a feed roll 42.

Adapted to bepressed against the roll 42 is a feed roll 43 secured toone end of a shaft v44 which, like the shaft 17, is floatingly i thegear 40 which drives it.

mounted in bosses 15 above the bosses 5' last mentioned. Upon the otherend of the shaft 44, there is secured a gear 45 that meshes with (SeeFigure 2.)

The faster moving rolls, or those rotated by 'the idler pinion 28, willnow be described. Meshing with the pinion 28 is a gear 46 secured to ashaft 47 journaled in suitable bearings in a pair of the bosses 5."On'the other 7 end of-this shaft 47 there is secured a roll 48 "formedwith a grooved periphery 49 as shown in Figure 9, to coact with a roll50 to per- 0111111116 first forming operation on the sheared metalstrip.

The gear 13, which has one more tooth than the gear 11 with which thepinion 29 meshes, drives the idler pinion 28 at a faster rate than thepinion 29; and through its engagement with the gear 46, the pinion 28 52that, like the shaft 17, is fioatingly mounted inbOsses 15 above thelast mentioned bosses the bosses 5. On the as shown in Figure 11.

5. Upon the other end of the shaft 52 there is secured a gear 54 thatmeshes with the gear 46 which drives it. (See Figure 2.)

Meshing with the gear 46 is an idler pinion 55 mounted on a stud 56 Inmesh with this pinion 55 is a gear 57' secured on a shaft 58 journaledin suitable bearings in a pair of bosses 5. .On the other end of thisshaft 58 there secured a roll 59 ha'vingthe grooved periphery 60 shownin Figure 10.

Adapted to enter the groove 60 in the roll 59 is a forming disc 61secured to one end of a shaft 62 which, like the shaft 17, is floatinglymounted in bosses 15 above the bosses 5 last mentioned. Upon the otherend of the shaft 62there is secured a gear 63, which meshes with thegear 57 that drives it. (See Figure 2.)

For the purpose of rotating the last forming rolls, there is mounted ona stud 64, for engagement with the gear 57, an idler pinion 65 thatmeshes with a gear 66 secured to a shaft 67 journaled in suitablebearings in the end bosses 5. On the other end of this shaft 67, thereis secured a crimping roll 68 formed in its peripheryv with two spacedflanges 69, 69

' Adapted to be pressed against the roll 68 is a roll 70for1ned with aconcaved periphcry 71 which both annular flanges 69, 69 on the roll 68en or to crimp thecurved sides of the tube formed by the precedingrolls.

The roll 7 O is secured to one end of a shaft 72 which, like the shaft17,- is fioatingly mounted in bosses 15 abovethe bosses 5 last referredto. Upon the other end of the shaft 72 there is secured a gear 73 thatmeshes with the gear 66 which drives it. (See Figure 2.) V

Referring to Figures 1 and 3,'there is se cured to the web 3 at one endof my forming machine just described, a horizontal bracket 7 4 for apair of guide plates 75, 7 5., The latter are secured by screws 76 tothe bracket 74, and are formed to provide, when screwed together, alongitudinal. slot 77 to. receive a metal strip 78 to guide it betweenthe feed rolls 42 and 43.

Intermediate guide plates 7 9, 79 are screwed to supporting piece 81attached to the web 3 between the paired rolls back of the feed rolls 42and43. Just beyond, and a little above, the meeting point of the rolls68 and 70, a straightening plate 82 secured to a bracket 83 that isattached to the web 3 by screws 84. r r

The operation of my machine will now be described. I

A metal strip 78 from a roll (not shown) is directed between the feedrolls 42 and 43 by the guide plates 75, 75. By these rolls the strip isfed between the guide plates 79, 79 to the sh aring rolls 33 and 35.

ieferring to'Figuresvl, 7 and 13 for a description of these rolls,itwillbe o served from Figure 13 there is provided'inthe periphery of theroll 33 a recess into which is fitted a i said drive shaft toreceivebetween them a Vmetal' strip, pairs of forming rollsmounted female die85 and a stripper 86 resting on a rubber cushion 87. In a recess in theperiphery of the upper roll 35 there is fitted a male. die 88 which isformed and located to co-actwith the female die 85 to cut the metalstrip78 into proper lengths, with an ear 89 formed on one end of each a and acorresponding groove 90 formed in its other end, (See-Fi ure 7.)

The strips so sheared, and'formed rolls 33 and 35 are directed bythe'guide plates.

79, 79 between the next rolls. 9 and '18, which feed them between thenext guide plates 79, 79 to the first forming rolls 48an'd 50. Theserolls form eachmetal strip with afiat bottom 91 and two slightlyupturned sides 92, 92. (SeeFigure9.) Q i I Y The rolls 59 and disc 61,which next receive the partly formed strip, give to the latter the morepronounced curvature shown in Figure 10. The still partlyjformed metalstrip is "then passed betweenthe next guide plates 79, e7 9 to the thirdforming rolls 68 and 70, which crimp it to its final shape shown in endsection in Figure 11. The strip is then forced against the straighteningplate82, issuing fromthe machine as the completed typetube 93 shown inFigure 12. i i

It is thus seen that my machine there may be quickly and cheaply formedfrom metal rolls, tubessuchfas the type tubes 93.

Having described my invention, I claim:

1. In a machine of the type described, the combination with asupp'ortingframe, of a plurality of pairs of superimposed rolls mountedin said frame adapted to receive between them a strip of metal, meanscarried by two of said rolls to shear said strip to proper length, apair of subsequent rolls being formed to bend said strip to channelshape, with a flat bottom, a next succeeding pair of rolls being formedto furtherv bend the walls of said channel, and the last-pair of rollsbeing formed'to crimp said walls closer to- V gether, and meansforrotating said rolls.

' 2. In a machine of the typedescribed, the combination with asupportingframe, of a greater number of teeth;

and supported by said web, a pair of shearing rolls mounted on said web,on one side of onsaid web and on the other side of said drive.

shaft to form said strip after it has been sheared by the first rolls,and means on said a faster rate of speed than the shearing rolls.

4:. In a'machine of the type described, the

drive shaft for rotating the forming rolls at combination with averticalsupporting web,

of a transverse drive shaft proj ecting through and supported by saidweb, a pair of roll shafts-mountedon each side of saiddrive shaft, apair of rolls forshearing a metal strip'mounted on one pair of said rollshafts,

a pair of rolls-forforming said strip mounted on the other pair of rollshafts, a drive gear mounted on said dri ve shaft, a seconddrivinggearwith a less number of teeth, also mounted a geared connectionbetween the forming roll a shafts and the driving gear l'iaving the 5.In a machine of the type described, the

combination with a vertical supporting web,

of a pair of oppositely disposed, hollowbosses I projecting horizontallyfrom said web, one 5 on each side of the latter, hollow bosses projecting laterally from said web above the first bosses, a horizontalbushing floatingly mountled in the upperbosses,ashaftjournaled in said 7bushing, a forming roll mounted on one end I of said vshaft, a formingroll mountedon the Y drive shaft immediately below the first roll, agear mounted on said drive shaft, a gear mountedon the'second shaft inmesh with the first gear, and screw means projecting through the tops ofthe upper bosses for engagement with said bushing to force the 'upperforming rolltoward the lower one for plurality of pairs 'of superimposedrolls 1 mounted in said frame adapted to receivevbetween them a strip'ofmetal, means carried by two-of said rolls to shear said strip'to properlength, a pairv of subsequent rolls being formed to bend said, strip tochannel shape, with a flat bottom, a next succeeding pair of rolls beingformed to further bend the walls of said channel, and the last pair ofrolls being formed to crimp said walls closer together, and means forrotating the last three I pairs of rolls at a faster rate thanthe.preced-' ing rolls. H

3. In a machine of the type described, the

combination'with a vertical supporting Web, 7

of a transverse drive shaft proj ecting through

